JP2018037319A - Connector for guide wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector for guide wire in which such a bug that electrical connection of a contact and a terminal is disconnected instantaneously is less likely to occur.SOLUTION: A connector 40 includes a grasping component 41, a support component 48, a terminal 44 connected electrically with the contact of a guide wire 30 grasped by the grasping component 41, and a guide component 47 rotatable about the axis line 30A of the guide wire 30 for the support component 48. The grasping component 41 includes a body 50 having an insertion hole 50a of the guide wire 30, and a grasping piece 51 extending along the axis line of the insertion hole 50a from the body 50, and capable of radial inward elastic deformation for the axis line. The guide component 47 has a guide surface 65a for guiding the grasping piece 51 radially inward, and when the grasping component 41 is slid for the guide component 47 along the axis line of the insertion hole 50a, the grasping piece 51 abuts on the guide surface 65a and elastically deforms radially inward.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a connector for a sensor-equipped guide wire that is inserted into a blood vessel.

  In order to detect various physical quantities in a blood vessel, such as blood pressure and blood temperature, a guide wire having a sensor is inserted into the blood vessel. For example, the guide wire is inserted into the vein from the lower part of the clavicle or the thigh and is delivered so as to reach the coronary artery.

  In order to calculate physical quantities such as blood pressure and blood temperature in the arithmetic unit based on the data obtained by the sensor, the guide wire is connected to the arithmetic unit via the connector so as to be electrically communicable. A contact is provided at the end of the guide wire, and a terminal is provided on the connector. The contact shape is generally cylindrical. In the connector described in Patent Document 1, the terminals are a pair of leaf springs arranged to face each other. In the state where the guide wire is inserted into the connector, the cylindrical contact is sandwiched between the pair of leaf springs. In this way, the contact point of the guide wire is electrically connected to the terminal of the connector.

JP-T-2001-516938

  When the guide wire is advanced and retracted in the blood vessel, the guide wire is rotated. By rotating the guide wire, the tip of the guide wire configured to be easily bent is rotated. The orientation of the tip of the curved guidewire is changed around the guidewire axis. Therefore, for example, it becomes easy to advance the tip of the guide wire into the target blood vessel at the branch point of the blood vessel.

  In the connector described in Patent Document 1, the terminals are a pair of leaf springs arranged to face each other as described above. Along with the rotation of the guide wire, the guide wire held by the pair of leaf springs can rotate and move in the radial direction with respect to the central axis of the guide wire.

  In the direction in which the pair of leaf springs face each other, even if the guide wire moves, the pair of leaf springs moves following the movement of the guide wire. However, the pair of leaf springs does not follow the movement of the guide wire in the direction orthogonal to the direction in which the pair of leaf springs face each other. For this reason, if the guide wire moves in a direction perpendicular to the direction in which the pair of leaf springs face each other, the electrical connection between the contact and the terminal may be momentarily disconnected, or the contact location between the contact and the terminal may be displaced. I'll be relaxed. As a result, the electric signal transmitted from the sensor to the arithmetic device may jump or drift.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a guide wire connector in which electrical connection between a contact and a terminal is difficult to be disconnected.

  (1) A guide wire connector according to the present invention includes a gripping part that grips a guidewire, a support part that rotatably supports the gripping part around an axis of a guidewire gripped by the gripping part, A terminal electrically connected to a contact point of the guide wire gripped by the grip portion; and a guide portion rotatable about the axis of the guide wire with respect to the support portion. The grip portion includes a main body having a guide wire insertion hole, and a grip piece extending from the main body along the axis of the insertion hole and elastically deforming radially inward with respect to the axis. Yes. The guide portion has a guide surface for guiding the grip piece inward in the radial direction. The gripping piece is elastically deformed inward in the radial direction by contacting the guide surface when the gripping part is slid along the axis of the insertion hole with respect to the guide part.

  According to the above configuration, the gripping piece is elastically deformed radially inward by contacting the guide surface when the gripping part is slid along the axis of the insertion hole with respect to the support part. As a result, the guide wire is gripped by the gripping piece. When slid in the opposite direction, the gripping piece comes off the guide surface, and the gripping of the guide wire is released. Therefore, by sliding the grip portion, the guide wire is gripped or released.

  (2) Preferably, the support portion locks the slide at the position where the grip piece abuts on the guide surface, and the grip piece can rotate around the axis of the guide wire. The grip portion is formed integrally with the main body and includes a hook portion that is elastically deformable inward in the radial direction, and a proximal end portion of the hook portion is provided at a proximal end portion of the hook portion. A recess is formed, and the recess is engageable with the lock portion.

  According to the said structure, when each recessed part engages with the locking part of a support component, it is controlled that a holding | grip component moves relatively along an axis line with respect to a connector main body.

  (3) Preferably, the grip portion includes a fitting portion that contacts and fits the guide portion at a position where the grip piece contacts the guide surface, and the guide portion includes the fitting portion. The to-be-fitted part fitted by the part is provided.

  According to the above configuration, when the gripping piece is in contact with the guide surface, even when the lock portion is not engaged with the concave portion, the fitting portion is fitted and brought into contact with the fitted portion, and the gripping component is Movement to the proximal side of the support part is prevented.

  (4) Preferably, the terminal has at least three terminal portions arranged around an axis of the guide wire held by the holding portion, and each of the three terminal portions includes the holding portion. The guide wires gripped by each other are in contact with the contact points while being elastically displaced outward in the radial direction.

  (5) Preferably, an angle θ around the axis of the guide wire between two adjacent terminal portions satisfies a relationship of 90 ° <θ <180 °.

  According to the above configuration, the angle θ around the guide wire axis between two adjacent terminal portions has at least three terminal portions arranged around the guide wire axis. Even if the contact moves in the radial direction so as to be displaced, each terminal portion follows the movement of the contact due to elastic deformation of the terminal portion. Therefore, it is difficult to cause a problem that the electrical connection between the contact and the terminal is momentarily disconnected. Preferably, the angle θ satisfies a relationship of 90 ° <θ <180 °.

  (6) More preferably, the angle θ satisfies the relationship θ = 120 °.

  According to the above configuration, since the angle θ satisfies the relationship of θ = 120 °, the three terminal portions are arranged at equal intervals. Therefore, even if the guide wire moves in any radial direction, each terminal portion follows the contact. Therefore, the problem that the electrical connection between the contact and the terminal is momentarily disconnected is less likely to occur.

  (7) Preferably, each of the terminal portions has a contact surface facing the contact point of the guide wire, and the contact surface is a cross section along an axis of the guide wire gripped by the grip portion. Is a curved shape that is convex inward in the radial direction of the guide wire.

  According to the above configuration, each terminal portion makes point contact with the contact point along the axis of the guide wire. Therefore, when the guide wire moves along the axis, each terminal portion easily retracts in a direction away from the axis. Therefore, the guide wire can be easily inserted into and removed from the connector.

  (8) Preferably, each of the terminal portions is a leaf spring, and each end of the terminal in the direction along the axis of the guide wire in each leaf spring is integrally formed in a cylindrical shape along the circumferential direction. It is a continuous shape.

  (9) Preferably, the terminal includes a main body in which one end in the direction along the axis of the guide wire in each leaf spring is integrally continuous in a cylindrical shape along the circumferential direction, and the other end of each leaf spring. And a converging tube that is elastically deformable so as to expand in diameter.

  According to the above configuration, the converging tube is fitted on the other end of each leaf spring, and can be elastically deformed so as to expand its diameter. The leaf spring as the terminal portion receives not only the urging force of the leaf spring itself but also the urging force of the cylindrical spring. Therefore, adjustment of the urging force of the terminal portion is easy.

  According to the present invention, it is difficult to cause a problem that the electrical connection between the contact and the terminal is momentarily disconnected.

FIG. 1 is a schematic diagram of a guide wire system according to a first embodiment of the present invention. FIG. 2 is a view showing a guide wire according to the first embodiment of the present invention. FIG. 3 is a perspective view of the pressure sensor. FIG. 4 is a perspective view of the connector according to the first embodiment of the present invention. FIG. 5 is an exploded perspective view of the connector according to the first embodiment of the present invention. 6 is a cross-sectional view of the connector according to the first embodiment of the present invention in an unlocked state, and in particular, FIG. 6 (A) is a cross-sectional view taken along the line VIA-VIA of FIG. B) is a cross-sectional view taken along the line VIB-VIB. 7 is a cross-sectional view of the connector according to the first embodiment of the present invention in a locked state. In particular, FIG. 7A is a cross-sectional view taken along the line VIA-VIA of FIG. ) Is a cross-sectional view taken along the line VIB-VIB. FIG. 8 is a cross-sectional perspective view of the terminal case according to the embodiment of the present invention taken along the line VIA-VIA in FIG. 4. FIG. 9 is a perspective view of the terminal of the connector according to the first embodiment of the present invention. 10A and 10B are diagrams of the terminals of the connector according to the first embodiment of the present invention. In particular, FIG. 10A is a front view, FIG. 10B is a top view, and FIG. FIG. 10D is a side view, and FIG. 10D is a development view. FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG. 9, and particularly FIG. 11A is a cross-sectional view of the terminal of the connector according to the first embodiment of the present invention, and FIG. FIG. 10C is a cross-sectional view of the connector terminals and the guide wire contacts according to the first embodiment of the present invention. FIG. 12 is a perspective view of a connector terminal according to the second embodiment of the present invention. FIG. 13 is a front view of a connector terminal according to the second embodiment of the present invention. FIG. 14 is contact stability data of amplifier input (V) -time (S) according to the first embodiment of the present invention. FIG. 15 is contact stability data of amplifier input (V) -time (S) for Volcano Combowire as a comparative product. FIG. 16 is contact stability data of amplifier input (V) -time (S) for St Jude Medical Sartus as a comparative product.

  Hereinafter, preferred embodiments of the present invention will be described. Note that each embodiment is merely one embodiment of the present invention, and it is needless to say that the embodiment can be changed without changing the gist of the present invention.

[First Embodiment]
<Guide wire system 10>
As shown in FIG. 1, the guidewire system 10 according to the first embodiment includes a guidewire 30, an arithmetic device 20, and a connector 40 that connects the guidewire 30 and the arithmetic device 20. The guide wire 30 is an elongated cord and can be inserted into a blood vessel such as a coronary artery. The guide wire 30 includes a pressure sensor 11 (FIG. 3) that outputs electrical information according to the pressure in the blood vessel.

  The computing device 20 includes a power supply unit 21 that supplies current to the pressure sensor 11 of the guide wire 30, a computing unit 22 that computes electrical information output from the pressure sensor 11, and a memory that stores information necessary for the computing process. 23. Electrical information output from the pressure sensor 11 is transmitted from the guide wire 30 to the computing unit 22 via the connector 40. The calculator 22 calculates blood pressure based on the electrical information output from the pressure sensor 11. That is, the guide wire system 10 is used for blood pressure measurement.

  In FIG. 1, the fixed end (the end connected to the computing device 20) of the both ends of the guide wire 30 is the proximal end (the lower left end in FIG. 1), and the free end (when inserted into the blood vessel) The tip is the distal end (the upper left end in FIG. 1). Hereinafter, in the guide wire 30, the side with the proximal end is defined as the proximal side, and the side with the distal end is defined as the distal side.

<Guide wire 30>
In FIG. 2, a guide wire 30 is shown. In FIG. 2, the left side is the distal side of the guide wire 30, and the right side is the proximal side of the guide wire 30. The guide wire 30 includes a tip guide portion 32, a first spiral body 33, a housing 34, a second spiral body 35, an electrode pipe 36, four contact points 37, a taper pin 38, and a tip guide pin 39. . The core wire 31 extends from the proximal end to the distal side. The tip guide portion 32 is disposed at the distal end. A first spiral 33, a housing 34, a second spiral 35, and an electrode pipe 36 are sequentially arranged from the distal end guide portion 32 toward the proximal end. The four contact points 37 are arranged on the outer peripheral side of the electrode pipe 36 and are arranged along the axis 30 </ b> A of the guide wire 30. The axis 30A indicates the axis of the guide wire 30 when the guide wire 30 is in a straight state without being bent or curved.

  The core wire 31 is a member that constitutes the skeleton of the guide wire 30. The distal end guide portion 32 is a hemispherical member that protrudes toward the distal side and is disposed at the distal end, and guides the traveling direction of the guide wire 30 along the blood vessel by coming into contact with the blood vessel wall. The first spiral body 33 and the second spiral body 35 are wire rods wound in a spiral shape, and are configured to bend more easily than the core wire 31 so that the distal end portion of the guide wire 30 is easily along the blood vessel. The housing 34 is a housing that houses the pressure sensor 11 in its internal space. The housing 34 has two through holes 34a. Blood can contact the pressure sensor 11 (FIG. 3) disposed inside the housing 34 through the through hole 34a. The electrode pipe 36 is a cylindrical member that houses four conductive wires 15 (FIG. 3) extending from the pressure sensor 11, and is fixed to the proximal end portion of the core wire 31. The four contact points 37 are connected to the four conductive wires 15 (FIG. 3), respectively, and are fixed to the outer peripheral surface of the electrode pipe 36. The shape of the contact point 37 is an annular shape (FIG. 11). The taper pin 38 is a member that reinforces the bending rigidity of the second spiral body 35, is fixed to the distal end portion of the core wire 31, and extends from the core wire 31 to the housing 34. The tip guide pin 39 is a member that reinforces the bending rigidity of the first spiral body 33, and is fixed to the housing 34 and the tip guide portion 32.

  As shown in FIG. 3, for example, the pressure sensor 11 includes a sensor main body 12, a diaphragm 13, a bridge circuit 14, four conductive wires 15, and a connection portion 16. The sensor body 12 is fixed to a taper pin 38 fixed to the core wire 31 by a connecting portion 16 made of, for example, an adhesive. A diaphragm 13, a bridge circuit 14, and four conductive wires 15 are attached to the sensor body 12. The bridge circuit 14 is a full bridge circuit in which all of the four resistors 17 function as strain gauges for measurement. The bridge circuit 14 includes four resistors 17, four terminals 18 </ b> A and 18 </ b> B, and four connectors 19. The four resistors 17 are fixed to the diaphragm 13. The four terminals 18A and 18B are composed of two input terminals 18A and two output terminals 18B. Each connection body 19 electrically connects each resistor 17 to each terminal 18A, 18B. Each conductive wire 15 is electrically connected to each terminal 18A, 18B.

  In a state where the guide wire 30 is inserted into the blood vessel and blood pressure is applied to the pressure sensor 11, the diaphragm 13 is elastically deformed according to the blood pressure. As the diaphragm 13 is elastically deformed, the four resistors 17 are elastically deformed, and the electric resistance values of the four resistors 17 are changed. In this state, when a voltage is applied between the two input terminals 18A, a potential difference is generated between the two output terminals 18B. Based on this potential difference, the magnitude of blood pressure can be specified in the arithmetic unit 20 (FIG. 1).

<Connector 40>
As shown in FIG. 4, the connector 40 includes a grip part (an example of a grip part) 41 that grips the guide wire 30 and a connector main body 42 to which the grip part 41 is attached. The connector body 42 includes a cable 43 that is electrically connected to the four conductive wires 15. The cable 43 is electrically connected to the arithmetic unit 20 (FIG. 1).

  In FIG. 4, the first direction 24 and the second direction 25 are directions orthogonal to the axis 30A. The first direction 24 and the second direction 25 are orthogonal to each other. Hereinafter, the attitude of the connector 40 will be described using the first direction 24 and the second direction 25. FIGS. 6A and 7A are cross-sectional views taken along a plane including the axis 30 </ b> A and along the first direction 24. FIGS. 6B and 7B are cross-sectional views taken along a plane including the axis 30 </ b> A and along the second direction 25.

  FIG. 5 is an exploded perspective view of the connector 40. The connector body 42 includes a cylindrical cover 45, a terminal case 46, a guide part (an example of a guide part) 47, and a support part (an example of a support part) 48.

  The gripping component 41 is shown in FIGS. As shown in FIG. 5, the gripping component 41 includes a main body 50, two gripping pieces 51, and two hook portions 52. The gripping component 41 is formed of a resin material. Therefore, the main body 50, the two grip pieces 51, and the two hook portions 52 are integrally formed.

  The shape of the main body 50 is roughly a cylindrical shape in which an insertion hole 50a that is an internal space extends along the axis 30A. The guide wire 30 can be inserted into the insertion hole 50a. The main body 50 includes a fitting portion 53 at the proximal end portion. The shape of the fitting part 53 is a disk shape centering on the axis 30A, and protrudes outward in the radial direction. When the fitting part 53 is combined with the connector main body 42 as the gripping part 41, the fitting part 53 is fitted with the guide part 47 and restricts the gripping part 41 from moving in the direction of insertion into the connector main body 42. Further, the fitting portion 53 abuts on the lock portion 69 of the support component 48 to prevent the gripping component 41 once inserted into the connector main body 42 from easily falling off the connector main body 42.

  The two grip pieces 51 extend along the axis 30A from the proximal end of the main body 50 (the left side in FIG. 5 and the right side in FIG. 6). The two gripping pieces 51 are opposed to each other in the second direction 25. Each shape of the two gripping pieces 51 is a semi-cylindrical shape extending along the axis 30A. When the two gripping pieces 51 come close to each other and come into contact with each other, a generally cylindrical shape is obtained. The two grip pieces 51 are separated in the second direction 25 in a state where no external force is applied. Each gripping piece 51 can be elastically deformed in a direction in which the proximal end sides approach each other with the connection position of each gripping piece 51 and the main body 50, that is, the distal end of each gripping piece 51 as a fulcrum. The guide wire 30 is inserted into the gripping component 41 through a space that becomes an internal space when the two gripping pieces 51 have a cylindrical shape. When the proximal end portion of each gripping piece 51 comes into contact with the guide part 47, the two gripping pieces 51 are elastically deformed so as to approach each other. As a result, the guide wire 30 is gripped by the two gripping pieces 51.

  The two hook portions 52 extend along the axis 30A from the distal end of the main body 50 (left side in FIG. 5, right side in FIG. 6) toward the proximal side (left side in FIG. 5, right side in FIG. 6). . In the second direction 25, the main body 50 is located between the two hook portions 52. Each hook portion 52 is elastically deformable inward in the radial direction with respect to the axis 30A with the connecting position of each hook portion 52 and the main body 50, that is, the distal end of each hook portion 52 as a fulcrum. A concave portion 52 a is formed at the proximal end portion of each hook portion 52. Each recess 52a is recessed radially inward with respect to the axis 30A in each hook portion 52. Each recess 52 a is engageable with the lock portion 69 of the support component 48. Each recessed portion 52a engages with the lock portion 69 of the support component 48, whereby the gripping component 41 is restricted from moving relative to the connector main body 42 along the axis 30A.

  A cylindrical cover 45 is shown in FIGS. The cylindrical cover 45 is arranged in order from the proximal side (lower left side in FIG. 5) to the distal side (upper right side in FIG. 5), and includes a terminal case 46 that houses the terminals 44, a guide component 47, and a support. The component 48 is stored. The terminal case 46, the guide component 47, and the support component 48 housed in the cylindrical cover 45 are assembled together and integrated.

  The shape of the cylindrical cover 45 is roughly a cylindrical shape extending along the axis 30A. The proximal end side of the cylindrical cover 45 has a cylindrical shape with a rectangular outer shape. The proximal end of the cylindrical cover 45 is sealed, and a cable hole 45a penetrating along the axis 30A is formed. The cable 43 extends from the inside of the cylindrical cover 45 to the outside through the cable hole 45a. The distal end side of the cylindrical cover 45 has a cylindrical shape. In the vicinity of the distal end of the peripheral wall of the cylindrical cover 45, two engagement holes 45b penetrating in the radial direction with respect to the axis 30A are formed. The two engagement holes 45 b are opposed to the first direction 24. The convex portion 68 of the support component 48 is engaged with each engagement hole 45b. The distal end of the cylindrical cover 45 is open.

  As shown in FIGS. 5 to 8, the terminal case 46 includes four terminals 44 (FIGS. 6 to 11) that are electrically connected to the four contacts 37 of the guide wire 30, respectively. As shown in FIG. 8, the terminal case 46 includes an inner case 54 that houses the four terminals 44, a connecting plate 55 to which the cable 43 is fixed, and an outer case 56 that houses the inner case 54 and the connecting plate 55. A wire guide component 57.

  As shown in FIG. 8, the cable 43 includes four conductive lines 26 and a protective coating 27 that covers the four conductive lines 26. The four conductive wires 26 are electrically connected to the four terminals 44 in the terminal case 46, respectively.

  The inner case 54 is an elongated rectangular parallelepiped configured by combining the first case piece 58 and the second case piece 59. The first case piece 58 and the second case piece 59 are opposed to each other in the first direction 24 and extend along the axis 30A. A space 60 extending along the axis 30 </ b> A is formed between the first case piece 58 and the second case piece 59. In the space 60, four terminals 44 are arranged along the axis 30A. The distal end of the inner case 54 is open, and the space 60 is continuous with the outside through this opening.

  The connecting plate 55 is a flat plate facing the first case piece 58 and the second case piece 59 in the first direction 24. The second case piece 59 is adjacent to the connecting plate 55. Four terminal holes 54 a are formed in the second case piece 59 along the first direction 24. Four terminal holes 51 a are formed in the connecting plate 55 along the first direction 24. Each terminal hole 51 a of the connecting plate 55 is continuous with each terminal hole 54 a of the second case piece 59. The connection portion 70 of the terminal 44 is inserted through the pair of terminal hole 54a and terminal hole 51a.

  Between the connecting plate 55 and the outer case 56, spaces 61 and 62 along the axis 30 </ b> A are formed on both sides in the first direction 24. In the space 61, the inner case 54 and the distal end portion of the protective coating 27 of the cable 43 are arranged. In the space 62, four connection portions 70 of the four terminals 44 protrude, and the four conductive wires 26 of the cable 43 are arranged, and each connection portion 70 is electrically connected to each conductive wire 26 by soldering. It is connected. For convenience of illustration, some of the conductive wires 26 are drawn in a broken state.

  The outer case 56 has a substantially rectangular cylindrical shape. The distal end portion of the outer case 56 is formed with a cylindrical first concave portion 56a and a second concave portion 56b that open to the distal side. The internal space of the first recess 56 a is continuous with the internal space of the internal case 54 housed in the external case 56. The first recess 56a and the second recess 56b each have an internal space along the axis 30A. A wire guide part 57 is fitted in the first recess 56a. The first cylindrical portion 64 of the guide component 47 is fitted into the second recess 56b.

  The wire guide component 57 is a component for positioning the guide wire 30 inserted into the connector 40 along the axis 30A. The wire guide component 57 has a cylindrical shape and has a through-hole penetrating along the axis 30A. The inner surface of the through-hole has two tapered surfaces 57a that are arranged on the distal side and the proximal side, respectively, and have a diameter reduced toward the center, and a circumferential surface 57b that connects the two tapered surfaces 57a. . The inner diameter of the circumferential surface 57 b is slightly larger than the outer diameter of the guide wire 30. The minimum diameter of the tapered surface 57a is equal to the inner diameter of the circumferential surface 57b, and the maximum diameter of the tapered surface 57a is larger than the inner diameter of the circumferential surface 57b. Each tapered surface 57a is tapered toward the circumferential surface 57b. Therefore, the guide wire 30 inserted into the wire guide component 57 is guided to be coaxial with the axis 30A by the circumferential surface 57b.

  A guide part 47 is shown in FIGS. The guide component 47 is a component that guides the distal portions of the two gripping pieces 51 of the gripping component 41 so as to be elastically deformed when the gripping component 41 is slid along the axis 30A.

  As shown in FIG. 5, the guide component 47 includes a first cylindrical portion 64 and a guide that are sequentially arranged from the proximal side (lower left side in FIG. 5) to the distal side (upper right side in FIG. 5). Part 65 and a second cylinder part 66 (an example of a fitted part). The 1st cylinder part 64, the guide part 65, and the 2nd cylinder part 66 are shape | molded integrally. The shape of the first cylindrical portion 64 is a bottomed cylindrical shape, but has a through hole 64a along the axis 30A. The guide wire 30 is inserted through the through hole 64a. The first cylindrical portion 64 is fitted into the second concave portion 56b of the terminal case 46 from the outside so as to be rotatable around the axis 30A. The guide part 65 is rotatable with respect to the terminal case 46.

  As shown in FIG. 5, the guide portion 65 has a cylindrical shape with an inner surface tapered. As shown in FIGS. 6 and 7, the inner surface of the guide portion 65 is a guide surface 65 a formed along the axis 30 </ b> A. The guide surface 65a is a tapered surface that tapers toward the proximal side (the right side in FIGS. 6 and 7).

  As shown in FIG. 5 to FIG. 7, the shape of the second cylindrical portion 66 is roughly a cylindrical shape. The inner diameter and the outer diameter of the second cylindrical portion 66 change stepwise in three stages so as to expand toward the distal side along the axis 30A. A support component 48 is fitted on the distal side of the second cylindrical portion 66. The fitting portion 53 of the main body 50 is fitted into the internal space of the second cylindrical portion 66.

  A support component 48 is shown in FIGS. The support component 48 is a component that supports the gripping component 41 so as to be rotatable around the axis 30A. The support component 48 includes a main body 67, two convex portions 68, and a lock portion 69. The shape of the main body 67 is a cylindrical shape having an internal space extending along the axis 30A. Each protrusion 68 protrudes radially outward from the outer peripheral surface of the main body 67 with respect to the axis 30 </ b> A. The two protrusions 68 are arranged to face the first direction 24 corresponding to the two engagement holes 45 b of the cylindrical cover 45. The lock portion 69 protrudes radially inward with respect to the axis 30 </ b> A from the inner peripheral surface of the main body 67. The lock part 69 is a ridge extending continuously around the axis 30A. In a state where the recess 52 a of the hook portion 52 of the gripping component 41 is engaged with the lock portion 69, the gripping component 41 is restricted from moving along the axis 30 </ b> A by the lock portion 69 and guided by the lock portion 69 to the axis line It can rotate around 30A.

  The connector 40 in the unlocked state and the locked state will be described with reference to FIGS. FIG. 6 shows the connector 40 in an unlocked state, and FIG. 7 shows the connector 40 in a locked state.

  Although the connector main body 42 can be disassembled as shown in FIG. 5, the terminal case 46, the guide component 47, and the support component 48 are accommodated in the cylindrical cover 45 and assembled together so as to be integrated. . The gripping component 41 can be attached to and detached from the connector main body 42.

  When the removed gripping component 41 is attached to the connector main body 42, the gripping component 41 is positioned from the distal side (left side in FIG. 6) to the proximal side (right side in FIG. 6) with the gripping piece 51 as the insertion front side. ). Although the outer diameter of the fitting part 53 is slightly larger than the outer diameter of the lock part 69, since the fitting part 53 is formed of a resin material, it can be elastically deformed. Therefore, when an external force is applied so as to push the gripping component 41 into the connector main body 42, the fitting portion 53 can move over the lock portion 69 and move to the proximal side. When the fitting portion 53 is positioned on the proximal side of the lock portion 69, the fitting portion 53 comes into contact with the lock portion 69, thereby preventing the gripping component 41 from dropping from the connector main body 42. Further, when an external force is applied so as to pull out the gripping component 41 from the connector main body 42, the fitting portion 53 moves over the lock portion 69 and moves to the distal side, and the gripping component 41 is detached from the connector main body 42.

  When the fitting portion 53 is located on the proximal side of the lock portion 69, the connector 40 can be switched between an unlocked state and a locked state. When the fitting portion 53 is not fitted to the second cylindrical portion 66 of the guide component 47, the connector 40 is in an unlocked state (FIG. 6). When the fitting portion 53 is fitted to the second tube portion 66 of the guide component 47, the connector 40 is in a locked state (FIG. 7). In the unlocked state, the guide wire 30 is not locked with respect to the connector 40. In the unlocked state, the gripping piece 51 is located in the guide portion 65 but is not in contact with the guide surface 65a. Since the two gripping pieces 51 are kept apart from each other, the two gripping pieces 51 do not grip the guidewire 30 even when the guidewire 30 is inserted into the connector 40.

  When an external force is applied so as to sandwich the two hook portions 52, the two hook portions 52 are elastically deformed and moved radially inward. Accordingly, the proximal end of the hook portion 52 is radially inward from the lock portion 69, and the proximal end of the hook portion 52 can be moved from the lock portion 69 to the proximal end side of the connector main body 42. When the gripping component 41 further moves to the proximal side, the fitting portion 53 fits and contacts the second tube portion 66, and the gripping component 41 is prevented from further moving to the proximal side of the connector body 42. . In a state where the fitting portion 53 is fitted to the second tube portion 66, the concave portion 52 a of the hook portion 52 faces the lock portion 69. When the external force applied to the two hook portions 52 is released, the hook portion 52 that is elastically restored moves outward in the radial direction, and the concave portion 52a and the lock portion 69 are engaged. As a result, the connector 40 is in the locked state shown in FIG. In the locked state, the gripping component 41 cannot move relative to the connector main body 42 in the direction along the axis 30A, but the gripping component 41 can rotate around the axis 30A with respect to the connector main body 42.

  The guide wire 30 is inserted into the connector 40 in an unlocked state. The proximal end of the guide wire 30 is inserted from the insertion hole 50a of the gripping part 41 through the gap between the two gripping pieces 51 and the wire guide part 57 until it contacts the inner wall of the proximal end of the inner case 54. . At this time, the four contact points 37 of the guide wire 30 are in contact with the four terminals 44 in the space 60, respectively.

  When the gripping component 41 is moved proximally with respect to the connector main body 42, the connector 40 changes from the unlocked state to the locked state. At this time, the proximal end of the gripping piece 51 moves toward the proximal side while contacting the guide surface 65a, so that the proximal end of the two gripping pieces 51 is elastically deformed so as to move inward in the radial direction. Is done. As a result, the guide wire 30 inserted into the connector 40 is gripped so as to be sandwiched between the two gripping pieces 51. Thus, the guide wire 30 is gripped so as not to come out of the connector 40 due to an external force applied to the guide wire 30 in a normal operation. In addition, since the guide wire 30 rotates integrally with the gripping component 41, when the gripping component 41 rotates relative to the connector main body 42 around the axis 30 </ b> A, the guidewire 30 also moves together with the gripping component 41 with respect to the connector main body 42. And rotate relatively around the axis 30A. Here, since the grip piece 51 is in contact with the guide surface 65 a, the guide component 47 also rotates together with the grip component 41.

  In the connector 40 in the locked state, the gripping component 41 can move along the axis 30 </ b> A by moving the two hook portions 52 radially inward by an external force so that the concave portion 52 a of the hook portion 52 moves away from the lock portion 69. It becomes. In this state, when the gripping component 41 is moved distally with respect to the connector main body 42, the connector 40 is changed from the locked state to the unlocked state.

<Terminal 44>
The terminal 44 will be described with reference to FIGS. 9 to 11. As shown in FIGS. 9 and 10, the terminal 44 includes a connecting portion 70, a first connecting portion 71, three terminal portions 72, and a second connecting portion 73. The material of the terminal 44 is a metal that has conductivity and can be bent, and is preferably spring steel. The connecting portion 70, the first connecting portion 71, the three terminal portions 72, and the second connecting portion 73 are integrally formed by punching and bending a metal plate.

  The connecting portion 70 is a portion that is electrically connected to the conductive wire 26 of the cable 43. The connecting portion 70 has an elongated flat plate shape that is bent into an L shape. Each of the first connecting portion 71 and the second connecting portion 73 connects both ends of the axis 30 </ b> A of the three terminal portions 72. Each of the first connecting portion 71 and the second connecting portion 73 has a substantially cylindrical shape.

  The three terminal portions 72 are arranged around the axis 30A. Each terminal portion 72 has the same shape, and has a long and narrow plate shape along the axis 30A, and is curved so that the center in the direction along the axis 30A swells radially inward. The angle θ that forms the pitch (interval) around the axis 30A in the adjacent terminal portions 72 is 120 ° (FIG. 11A). In other words, the center or one edge of the surface of each terminal portion 72 facing the axis 30A has a phase difference of 120 °.

  The inner surface of the terminal portion 72 is a contact surface 72 a that faces the contact point 37 of the guide wire 30. As shown in FIGS. 9 and 10C, the cross section of the contact surface 72a cut by a plane including the axis 30A is curved so as to protrude radially inward with respect to the axis 30A. Further, as shown in FIGS. 9 and 10A, the contact surface 72a at the cut surface orthogonal to the axis 30A is a straight line. When the guide wire 30 is gripped by the connector 40, each contact surface 72a contacts the contact point 37 at a position closest to the axis 30A. Since the contact point 37 is a circumferential surface, the contact between the contact surface 72a and the contact point 37 is a so-called point contact.

  The terminal portion 72 has elasticity as a leaf spring due to the curved shape. In a state where the contact points 37 of the guide wire 30 are in contact with the terminal portions 72, the terminal portions 72 are elastically deformed radially outward.

  With reference to FIG. 11, the change of the position of the three terminal parts 72 is demonstrated. In each drawing of FIG. 11, a cross section of the terminal 44 at a position closest to the axis 30 </ b> A in the terminal portion 72 is shown.

  FIG. 11A shows the position of the terminal portion 72 in a natural state, that is, in a state where the contact point 37 of the guide wire 30 is not in contact with the terminal 44.

  FIG. 11B shows the position of the terminal portion 72 in a state where the contact point 37 of the guide wire 30 is in contact with the terminal 44. Since the radius of the outer peripheral surface of the contact 37 is larger than the shortest distance from the axis 30 </ b> A to the contact surface 72 a of the terminal portion 72, each terminal portion 72 is elastically deformed radially outward by contacting the contact 37. Thereby, each contact surface 72a moves to a radial direction outer side from a natural state. The axis of the guide wire 30 in FIG. 11B coincides with the axis 30 A of the connector 40. Therefore, the contact surface 72 a of each terminal portion 72 is at a position away from the axis 30 </ b> A by a distance equal to the radius of the outer peripheral surface of the contact 37. Since each terminal part 72 is elastically deformed, each terminal part 72 is urged toward the contact point 37 by its restoring force. Thereby, each terminal part 72 press-contacts to the contact point 37, and the electrical connection of the terminal 44 and the contact point 37 is maintained.

  FIG. 11C also shows the position of the terminal portion 72 in a state where the contact point 37 of the guide wire 30 is in contact with the terminal 44. In FIG. 11C, the axis 30 </ b> B of the guide wire 30 is located away from the axis 30 </ b> A of the connector 40. Such a state occurs when the user performs an operation such as rotating the guide wire 30. The operation of the guide wire 30 is performed, for example, when the guide wire 30 is advanced or retracted in the blood vessel. For example, when the guide wire 30 rotates, the gripping component 41 that grips the guide wire 30 also rotates together. The gripping component 41 is rotatably supported by the support component 48. For this reason, the guide wire 30 rotates relative to the connector main body 42 placed on a desk, for example. The rotation of the connector main body 42 is suppressed, for example, when the rectangular outer portion of the cylindrical cover 45 comes into contact with the mounting surface of the desk.

  When the guide wire 30 rotates relative to the connector main body 42, the contact point 37 of the guide wire 30 rotates relative to the terminal 44 of the connector 40. Since the gripping component 41 that grips the guide wire 30 rotates relative to the connector main body 42, there are tolerances and backlash between them. The gripping component 41 rattles against the connector main body 42 due to the rotational torque of the guide wire. As a result, the contact point 37 moves in the radial direction, and the axis 30B of the guide wire 30 is disengaged from the axis 30A of the connector 40. Thus, even if the contact 37 moves in the radial direction, the three terminal portions 72 follow the movement of the contact 37 due to the urging force generated by the elastic deformation of the three terminal portions 72. Therefore, the electrical connection between the three terminal portions 72 and the contact point 37 is maintained. In addition, because the contact point 37 is returned to the position of the axis 30A due to the balance of the urging forces of the three terminal portions 72, the position of the contact point 37 is returned from the position of FIG. 11C to the position of FIG. It's easy to do.

<Usage example of guide wire system 10>
The guidewire system 10 is used, for example, to measure blood pressure in a coronary artery. The guide wire 30 is inserted into the coronary artery with the distal end provided with the tip guide portion 32 as the head in the direction of insertion into the blood vessel.

  When the pressure sensor 11 reaches the blood pressure measurement position in the coronary artery, the insertion of the guide wire 30 is interrupted. In such a state, a constant voltage is supplied from the power supply unit 21 to the pressure sensor 11 by a user operation.

  In the blood vessel, blood flows into the internal space of the housing 34, and blood pressure acts on the surface of the diaphragm 13 of the pressure sensor 11. Thereby, the diaphragm 13 is elastically deformed, and the electric resistance values of the four resistors 17 change accordingly.

  In the blood flow, pulsations in which blood pressure rises and falls repeatedly due to the movement of the heart are generated. The four resistors 17 elastically deform following the blood flow pulsation. Thereby, the electrical resistance value of the four resistors 17 changes corresponding to the blood pressure of the pulsating blood flow.

  The computing unit 22 of the computing device 20 acquires electrical information output from the pressure sensor 11. As described above, the calculation unit 22 calculates the blood pressure acting on the pressure sensor 11 based on this electrical information.

  When the blood pressure measurement position is changed during blood pressure measurement, operations such as rotation and slide of the guide wire 30 are performed as necessary to change the position of the guide wire 30. When the guide wire 30 is operated, the contact point 37 of the guide wire 30 is moved in the radial direction by, for example, rotational torque. Each terminal portion 72 of the terminal 44 provided on the connector 40 follows the radial movement of the contact 37. Therefore, the electrical connection between the contact 37 and the terminal 44 is maintained even in a situation where rotational torque is applied. Therefore, it is difficult for data transmitted from the pressure sensor 11 to the arithmetic unit 20 to jump or drift.

<Operational effects of the first embodiment>
According to the connector 40 according to the first embodiment, the gripping piece 51 is brought into contact with the guide surface 65a and has a diameter by the gripping component 41 being slid along the axis 30A of the insertion hole 50a with respect to the support component 48. Elastically deforms inward. As a result, the guide wire 30 is gripped by the gripping piece 51. When slid in the opposite direction, the gripping piece 51 is detached from the guide surface 65a, and the gripping of the guide wire 30 is released. Therefore, by sliding the gripping component 41, the guide wire 30 is gripped or released.

  Each recess 52a engages with the lock portion 69 of the support component 48, so that the gripping component 41 is restricted from moving relative to the support component 48 along the axis 30A.

  When the gripping piece 51 is in contact with the guide surface 65a, even if the hook portion 52 is elastically deformed and the lock portion 69 is not engaged with the concave portion 52a, the fitting portion 53 is in the second cylindrical portion 66. And the gripping component 41 is prevented from moving to the proximal side of the support component 48.

  Since the angle θ around the axis 30A of the guide wire 30 between the two adjacent terminal portions 72 satisfies the relationship of 90 ° <θ <180 °, the contact 37 so that the axes 30A and 30B of the guide wire 30 are shifted. Even if the terminal portion 72 moves in the radial direction, each terminal portion 72 follows the movement of the contact point 37 due to elastic deformation of the terminal portion 72. Therefore, it is difficult to cause a problem that the electrical connection between the contact point 37 and the terminal 44 is momentarily disconnected.

  Since the angle θ satisfies the relationship θ = 120 °, the three terminal portions 72 are arranged at equal intervals. Therefore, each terminal portion 72 follows the contact point 37 regardless of the radial movement of the guide wire 30. Therefore, the problem that the electrical connection between the contact point 37 and the terminal 44 is momentarily disconnected is less likely to occur.

  Since each terminal portion 72 makes point contact with the contact point 37 along the axis 30A of the guide wire 30, when the guide wire 30 moves along the axis 30A, each terminal portion 72 easily retracts in a direction away from the axis 30A. . Therefore, the guide wire 30 can be easily inserted into and removed from the connector 40.

  The lock portion 69 locks the slide at the position where the gripping piece 51 abuts on the guide surface 65 a and allows the guide component 47 to rotate around the axis 30 </ b> A of the guide wire 30. Therefore, when the connector main body 42 is installed on the work desk with the guide wire 30 held by the holding component 41, the cylindrical cover 45 itself does not rotate, and the guide component 47 and the holding component 41 can rotate. Become. Therefore, since the connector main body 42 itself does not rotate due to vibrations when operating the guide wire, it is difficult to cause a problem that electrical connection is instantaneously disconnected.

<Contact stability data>
With reference to FIGS. 14 to 16, an experimental method and experimental results for confirming the contact stability of the terminal 44 will be described.

  For the connector 40 according to the present embodiment and a comparative product, an experiment for evaluating the electrical contact stability as a female terminal was performed. As comparative products, Volcano Combowire and St Jude Medical Sartus were used. In these comparative products, members corresponding to the gripping component 41 and the connector main body 42 in the connector 40 are fixed by a screw type, and are not relatively rotated (see, for example, JP-T-2001-516938). For the connector 40 and the comparative product, a gold-plated SUS pin with a diameter of φ0.36 mm having the same diameter as the 0.014 mm guide wire was used as a male terminal in order to simulate the state where the guide wire terminal electrode was connected. A 100Ω simulated resistor was connected to the base end of the male terminal by soldering. The distal end side of the male terminal was inserted into the female terminal, and the contact resistance between the male terminal proximal end and the female terminal was evaluated.

  For the evaluation of the contact resistance, an amplifier circuit including a Wheatstone bridge was used. We designed and used a device that amplifies and outputs the difference between the resistance between the male terminal base and female terminals (approximately 100Ω) and the reference resistance of 100Ω. For offset adjustment, the reference resistance was slightly increased or decreased from 100Ω so that the baseline became 3V. In this amplifier circuit, a change in output voltage of 1V corresponds to a change in contact resistance of 0.5Ω. The output voltage from the amplifier circuit was recorded with a data logger (YOKOGAWA, DL850). In the above connection state, the movement of the guide wire assumed during the operation was simulated, vibration and rotation were loaded on the male terminal, and the fluctuation of the amplifier circuit output at that time was confirmed. The results are shown in FIGS. In the connector 40 (FIG. 14), it was confirmed that the change in amplifier output (that is, the change in contact resistance) when vibration and rotation were applied to the male terminal was suppressed more than that of the comparative product (FIGS. 15 and 16). This shows the possibility of suppressing the contact failure caused by the movement of the guide wire during the operation and the drift of the sensor output due to the contact failure.

[Second Embodiment]
<Terminal 144>
A terminal 144 according to the second embodiment will be described with reference to FIGS. 12 and 13. The connector 40 according to the second embodiment is different from the connector 40 according to the first embodiment in the configuration of the terminals 144. In other respects, the second embodiment is the same as the first embodiment. Below, the structure of the terminal 144 which concerns on 2nd Embodiment is demonstrated. In addition, the same code | symbol is attached | subjected to the member common to 1st Embodiment, and description about these members is abbreviate | omitted.

  The terminal 144 includes a main body 80 and a converging tube 81. The main body 80 includes a connecting portion 70, a first connecting portion 71, and three terminal portions 172. The material of the main body 80 is a metal that has conductivity and can be bent, and is preferably spring steel. The connecting portion 70, the first connecting portion 71, and the three terminal portions 172 are integrally formed by punching a metal plate and bending it.

  The terminal part 172 is configured in the same manner as the terminal part 72 according to the first embodiment except that one end of the axis 30A is open. The inner surface of the terminal portion 172 is a contact surface 172a that faces the contact point 37 of the guide wire 30, and the contact surface 172a is curved so as to protrude radially inward.

  A converging tube 81 is externally fitted to one end of the terminal portion 172 in the direction along the axis 30A. The shape of the converging tube 81 is a cylindrical shape. The material of the converging tube 81 is a resin material. Therefore, the converging tube 81 can be elastically deformed so as to expand its diameter.

  One end portion of each terminal portion 172 is supported by the first connecting portion 71, and the other end portion is supported by the converging tube 81. Therefore, each terminal portion 172 functions as a leaf spring when the contact point of the guide wire 30 is disposed inside the three terminal portions 172.

<Effects of Second Embodiment>
According to the connector 40 according to the second embodiment, the converging tube 81 is externally fitted to the other end of each terminal portion 72 and can be elastically deformed so as to increase in diameter. The leaf spring that is the terminal portion 72 receives not only the urging force of the leaf spring itself but also the urging force by the first connecting portion 71 that is a cylindrical spring. Therefore, adjustment of the urging force of the terminal portion 72 is easy.

[Modification]
As mentioned above, although embodiment of this invention has been described in detail, the above description is only illustration of this invention in all the points. It goes without saying that various improvements and modifications can be made without departing from the scope of the present invention. Regarding each component of the connector 40 according to each embodiment, the component may be omitted, replaced, and added as appropriate according to the embodiment. In addition, the shape and size of each component of the connector 40 may be appropriately set according to the embodiment. For example, the following changes can be made.

  In the first and second embodiments, the terminals 44 and 144 include the three terminal portions 72 and 172, but are not limited to this configuration. The terminals 44 and 144 may include four or more terminal portions 72 and 172. In this case, for at least three terminal portions 72 and 172 of the four or more terminal portions 72 and 172, the angle θ between the two adjacent terminal portions 72 and 172 has a relationship of 90 ° <θ <180 °. Satisfies.

  In the first and second embodiments, the angle θ between two adjacent terminal portions 72 and 172 satisfies the relationship θ = 120 °, but is not limited to this configuration. The angle θ may be another angle as long as the relationship of 90 ° <θ <180 ° is satisfied. The pitch (interval) around the axis 30A may not be uniform.

  In the first and second embodiments, the shapes of the contact surfaces 72a and 172a in the cross section along the axis 30A are curved shapes that protrude radially inward, but are not limited to this configuration. The shape of the contact surfaces 72a and 172a is not limited as long as it is a shape that can contact the contact point 37, that is, the distance between the contact surfaces 72a and 172a and the axis 30A is smaller than the radius of the contact point 37 of the guide wire 30. The shapes of the contact surfaces 72a and 172a may be curved surfaces or flat surfaces extending in parallel with the axis 30A.

  In the first and second embodiments, the shapes of the contact surfaces 72a and 172a in the cross section perpendicular to the axis 30A are linear shapes, but are not limited to this configuration. The shapes of the contact surfaces 72a and 172a in this cross section may be curves that are convex toward the axis 30A, or conversely, curves that are concave toward the axis 30A. In the case of a curve that is concave toward the axis 30 </ b> A, the curvature radius of the contact surfaces 72 a and 172 a is preferably larger than the curvature radius of the outer surface of the contact point 37 so as not to cause resistance when the guide wire 30 is inserted and removed.

  In the first and second embodiments, the connector 40 includes four terminals 44 and 144, but is not limited to this configuration. The number of terminals 44, 144 may be the same as the number of contacts 37 of the corresponding guide wire 30, and may be two, three, or five or more, for example.

  In the first and second embodiments, with the distal end of each hook portion 52 as a fulcrum, the proximal end side is elastically deformed inward in the radial direction with respect to the axis 30 </ b> A, and the gripping component 41 is slid onto the guide component 47. However, the gripping component 41 and the guide component 47 may be screwed together, and the form is not particularly limited. The grip piece 41 of the grip component 41 may be singular or plural, and the main body 50 and the grip piece 51 may be separate members.

  In the first and second embodiments, the lock portion 69 is provided on the inner surface of the support component 48. However, the support component 48 is formed integrally with the cylindrical cover 45, and the integrally formed cylindrical cover 45 itself. A lock portion 69 may be provided on the inner surface. Moreover, the lock | rock part 69 should just match | combine with the number of the recessed parts 52a of the corresponding holding | grip component 41, for example, may be two, three, or five or more.

  In the first and second embodiments, the connector 40 of the pressure sensor 11 is used. However, the connector is not limited to the pressure sensor, and may be any device that can measure the physical quantity of blood in the blood vessel. The measurement element may be, for example, a flow rate sensor that measures the flow rate of blood in the blood vessel, a flow rate sensor that measures the flow rate of blood flow in the blood vessel, a temperature sensor that measures the temperature of blood, and the like.

DESCRIPTION OF SYMBOLS 10 ... Guide wire system 11 ... Pressure sensor 30 ... Guide wire 30A ... Axis 35 ... 2nd spiral body 37 ... Contact 40 ... Connector 41 ... Gripping component (gripping part) Example)
42 ... Connector body 43 ... Cable 44, 144 ... Terminal 47 ... Guide parts (an example of guide part)
48 ... Supporting parts (an example of a supporting part)
50 ... Main body 50a ... Insertion hole 51 ... Holding piece 53 ... Fitting part 65a ... Guide surface 69 ... Lock part 72, 172 ... Terminal part 72a, 172a ... Contact surface 80 ... Body 81 ... Converging tube θ ... Angle

Claims (9)

A gripping part for gripping the guide wire;
A support part that supports the grip part rotatably about the axis of the guide wire gripped by the grip part;
A terminal electrically connected to the contact point of the guide wire gripped by the grip portion;
A guide part rotatable around the axis of the guide wire with respect to the support part,
The gripping part is
A main body having a guide wire insertion hole;
A gripping piece extending from the main body along the axis of the insertion hole and elastically deformable inward in the radial direction with respect to the axis;
The guide part has a guide surface for guiding the grip piece inward in the radial direction,
The gripping piece is a guidewire connector that abuts against the guide surface and elastically deforms radially inward when the gripping portion is slid along the axis of the insertion hole with respect to the guide portion. The support portion includes a lock portion that locks the slide at a position where the grip piece abuts on the guide surface and allows the grip piece to rotate around the axis of the guide wire. And
The grip portion is formed integrally with the main body and includes a hook portion that is elastically deformable inward in the radial direction.
The guide wire connector according to claim 1, wherein a concave portion is formed at a proximal end portion of the hook portion, and the concave portion is engageable with the lock portion. The grip portion includes a fitting portion that contacts and fits the guide portion at a position where the grip piece contacts the guide surface.
The guide wire connector according to claim 1, wherein the guide portion includes a fitted portion to be fitted to the fitting portion. The terminal has at least three terminal portions arranged around the axis of the guide wire gripped by the grip portion,
4. Each of the at least three terminal portions is in contact with the contact point while being elastically displaced radially outward of the guide wire gripped by the grip portion. Guide wire connector.   The guide wire connector according to claim 1, wherein an angle θ around the axis of the guide wire between two adjacent terminal portions satisfies a relationship of 90 ° <θ <180 °.   The guide wire connector according to claim 5, wherein the angle θ satisfies a relationship of θ = 120 °. Each terminal portion has a contact surface facing the contact point of the guide wire,
7. The contact surface according to claim 1, wherein a cross section along an axis of the guide wire gripped by the grip portion has a curved shape that protrudes radially inward of the guide wire. Guide wire connector.   Each of the terminal portions is a leaf spring, and the terminal has a shape in which both ends of each leaf spring in the direction along the axis of the guide wire are integrally continuous in a cylindrical shape along the circumferential direction. Item 8. A guide wire connector according to any one of Items 1 to 7. The above terminals are
One end of each leaf spring in the direction along the axis of the guide wire is integrally continuous in a cylindrical shape along the circumferential direction;
The guide wire connector according to any one of claims 1 to 8, further comprising a converging tube that is externally fitted to the other end of each of the leaf springs and is elastically deformable so as to expand its diameter.